Power supply apparatus, method for controlling the same, and power supply system

Abstract

A power supply apparatus of this invention includes a communication unit that performs transmission of power and transmission/reception of information, in a non-contact manner, a plurality of object sensors that are provided on a placing table, and generate object detection signals, a determiner that determines, based on identification information of the electronic device acquired by the communication unit, whether or not the detection signals from the object sensors are within predetermined reference value ranges, a power supply unit that supplies power to the electronic device if it is determined that the detection signals are within the reference value ranges, and a controller that uses signals from object sensors that have not detected placement of the electronic device for detecting extraneous object, and that controls the power supply unit based on whether or not an extraneous object is detected.

What is claimed is: 
     
       1. A power supply apparatus that wirelessly supplies power to an electronic device placed on a placing table, comprising:
 a communication unit that performs transmission of power and transmission/reception of information in a non-contact manner; 
 a plurality of object sensors that are provided on the placing table, and generate object detection signals; 
 a storage unit which stores a table associating reference value ranges with identification information of an electronic device, 
 a determiner that determines, based on identification information of the electronic device that is acquired by the communication unit, whether or not the detection signals from the plurality of the object sensors are within predetermined reference value ranges; 
 a power supply unit that supplies power to the electronic device if it is determined by the determiner that the detection signals are within the reference value ranges; and 
 a controller that uses a signal from, among the plurality of object sensors, an object sensor that has not detected placement of the electronic device as a signal for extraneous object detection, and that controls the power supply unit based on whether or not an extraneous object is detected, 
 wherein the reference value ranges depend on the identification information of the electronic device, 
 wherein the determiner obtains the reference value ranges by referring to the table with the identification information of the electronic device acquired by the communication unit. 
 
     
     
       2. The apparatus according to  claim 1 , wherein the determiner makes the determination with reference to the storage unit that stores a table in which the identification information of an electronic device placed on the placing table is associated with values of detection signals from the plurality of object sensors. 
     
     
       3. The apparatus according to  claim 2 , wherein values of detection signals are stored in the table for respective directions in which the electronic device is placed. 
     
     
       4. The apparatus according to  claim 2 , further comprising:
 a judger that judges whether or not the identification information of the electronic device acquired by the communication unit matches identification information in the table stored in the storing unit, wherein 
 in a case of a determination that the identification information matches identification information in the table, the power supply unit supplies power for charging a battery of the electronic device. 
 
     
     
       5. The apparatus according to  claim 4 , further comprising:
 an input unit that, if the judger judges that the identification information of the electronic device acquired by the communication unit does not match any identification information in the table stored in the storing unit, receives an instruction from a user, the instruction indicating whether or not to permit a placed electronic device as a device to receive power supply, wherein 
 if the input unit received a permitting input, the power supply apparatus supplies power for charging the battery of the electronic device. 
 
     
     
       6. The apparatus according to  claim 1 , wherein
 if an extraneous object is detected while power for charging is supplied to the electronic device, the controller stops the supply of power to the electronic device, or switches to supply of power lower than the power supplied for charging. 
 
     
     
       7. The apparatus according to  claim 1 , wherein
 among the plurality of object sensors, the controller determines, as an object sensor for detecting removal of the electronic device, an object sensor that outputs a detection signal indicating presence of the electronic device when supply of power to the electronic device started, and if an object is no longer detected by the determined object sensor, the controller stops the supply of power for charging, or switches to supply of power that is lower than the power supplied for charging. 
 
     
     
       8. The apparatus according to  claim 1 , wherein
 the communication unit performs transmission of power and transmission/reception of information in a non-contact manner using an antenna housed in the placing table, and 
 the plurality of object sensors are provided in a periphery of the antenna. 
 
     
     
       9. The apparatus according to  claim 1 , wherein
 the plurality of object sensors are each a photoreflector. 
 
     
     
       10. The apparatus according to  claim 1 , wherein
 the communication unit is an NFC (Near Field Communication) communication unit. 
 
     
     
       11. A method for controlling a power supply apparatus comprising a communication unit that performs, in a non-contact manner, transmission of power to and transmission/reception of information with an electronic device placed on a placing table, a storage unit which stores a table associating reference value ranges with identification information of the electronic device, and a plurality of object sensors that are provided on the placing table and that generate object detection signals, the method comprising:
 determining, based on identification information of the electronic device that is acquired by the communication unit, whether or not the detection signals from the plurality of the object sensors are within predetermined reference value ranges; 
 supplying power to the electronic device if it is determined that the detection signals are within the reference value ranges; and 
 using a signal from, among the plurality of object sensors, an object sensor that has not detected placement of the electronic device as a signal for extraneous object detection, and controlling the power supply based on whether or not an extraneous object is detected, 
 wherein the reference value ranges depend on the identification information of the electronic device, 
 wherein in the determining, the reference value ranges are obtained by referring to the table with the identification information of the electronic device acquired by the communication unit. 
 
     
     
       12. A non-transitory computer-readable storage medium that stores a program that, by being loaded and executed by a computer that includes a communication unit that performs, in non-contact manner, transmission of power to and transmission/reception of information with an electronic device placed on a placing table, a storage unit which stores a table associating reference value ranges with identification information of the electronic device, and a plurality of object sensors that are provided on the placing table and generate object detection signals, causes the computer to execute steps of a method for controlling a power supply apparatus that supplies power to the electronic device, the method comprising:
 determining, based on identification information of the electronic device that is acquired by the communication unit, whether or not the detection signals from the plurality of the object sensors are within predetermined reference value ranges; 
 supplying power to the electronic device if it is determined that the detection signals are within the reference value ranges; and 
 using a signal from, among the plurality of object sensors, an object sensor that has not detected placement of the electronic device as a signal for extraneous object detection, and controlling the power supply based on whether or not an extraneous object is detected, 
 wherein the reference value ranges depend on the identification information of the electronic device, 
 wherein in the determining, the reference value ranges are obtained by referring to the table with the identification information of the electronic device acquired by the communication unit. 
 
     
     
       13. A power supply system constituted by a power supply apparatus that wirelessly supplies power to an electronic device placed on a placing table, a storage unit which stores a table associating reference value ranges with identification information of the electronic device, and the electronic device that receives power from the power supply apparatus, wherein the power supply apparatus comprises:
 a communication unit that performs transmission of power and transmission/reception of information in a non-contact manner; 
 a plurality of object sensors that are provided on the placing table, and generate object detection signals; 
 a determiner that determines, based on identification information of the electronic device that is acquired by the communication unit, whether or not the detection signals from the plurality of the object sensors are within predetermined reference value ranges; 
 a power supply unit that supplies power to the electronic device if it is determined by the determiner that the detection signals are within the reference value ranges; and 
 a controller that uses a signal from, among the plurality of object sensors, an object sensor that has not detected placement of the electronic device as a signal for extraneous object detection, and that controls the power supply unit based on whether or not an extraneous object is detected, 
 wherein the reference value ranges depend on the identification information of the electronic device, 
 wherein the determiner obtains the reference value ranges by referring to the table with the identification information of the electronic device acquired by the communication unit.